Projection screen



Feb. 17;. M25. 1,526,715

PROJECTION SCREEN Patented Feb. 1925.

UNITED S ATES PATENT- OFFICE.

smunn my moon mm HARRY nmxtron MOON, or BIRMINGHAM, ENGLAND.

PROJECTION SCREEN.

i munfiled June 4,

To all whom itma comm.

Be it known t at we, SAMUEL HENRY Moon and HARRY HAMIIIION MOON, both subjects of the Kingdom of Great Britain,

both residing at 10 and 12 Hollowa iHead,

arw1ck,

Birmingham, in the county of England, mechanical engineers, have invented certain new and useful Improvements in or Relating to Projection Screens, of which the following is a specification.

This invention relates. to screens for cinematograph and like projecting apparatus, of the'type'in which thescreen has a surface which is curved in the cross-section of the screen.

Screens of this character assume considerable dimensions and are usually of a character such that as a whole they are not fitted for transport or installation in existing buildings. In an existing building it is not convenient to, manufacture a screen of this character within the building for installation, and it is one of the ob ects of the present invention to provide for the ready transport and installation of a screen of this character.

. With this object in view,the present invention comprehends a screen-of this character which is manufactured in sections adapted to be aggregated or assembled to produce the complete screen. These sections can thus be manufactured in any suitable vicinity, transported by road or 'rall, conveyed into'a building throu h the ordinary doorways and readily insta led in position within the building expeditiously and without creating inconvenience.

Advantageously the screen according to the present invention'is of concave form involving a surface which is curved in the ver?v tical and also A in the horizontal transverse sections of the screen,

The invention, however, extends to a screen having. only asimple curve as distinguished from; this spherical orsubstantially spherical formation.

In order that this invention may be clearly understood and, readily carried into practice, reference may had to the appended explanatory drawmg,-wh1ch illus- 1921. Serial no. 474,983.

an audience, constructed according to the present invention.

In a convenient embodiment'iof the present mventlon, we construct a screen a wlth a concave surface I) adapted to exhibit the picture projected from a cinematograph apparatus. be composed of a wooden back-ground c or reinforcin provision carrying at its front surface a layer of plaster which is formed to present the desired concave surface. Advantageously the screen is in sections for convenience in installation and transport, and each section may be of box-like formation at the rear so that the box sections can Such a screen may, for instance,

be secured together in any appropriate.

manner. In the embodiment shown, the screen is divided at a? into four sections, but obviously a larger number of divisions may be incorporated where necessary or desirable. Alternatively, the screen may be constructed of sheet metal or any other appropriate material. l

While, in the embodiment shown, the screen surface is of concave formation and curved .both laterally and vertically, the curve may occur in onl a-vertical, lateral, or inclined direction. nany of these formations the surface may be convex or bul ed instead of concave or hollowed.

at we claim as our invention and desire to secure by Letters'Pa'tent is A screen for a cinematographz and like projecting apparatus, in which the screen has a surface which is curved in the crosssection, of the screen, wherein the said screen is manufactured in sections adapted to be aggregated or assembled to produce.

the complete screen, each'section being of box-like formation at the rear, and presenting a plane rear face, adaptin the same to bear against a flat wall of abuilding wherein the screen is to be installed. 1

In witness whereof we have hereunto set our hands.

. SAMUEL HENRY MOON. HARRY HAMILTON MOON. 

